Home / 57,180.49-78,909.54-31,687.28

Finding the Fourth Proportional to 57,180.49, 78,909.54 and 31,687.28

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Solution

The fourth proportional to 57,180.49, 78,909.54 and 31,687.28 is: 43,728.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,180.49 : 78,909.54 = 31,687.28 : x
  2. Step 2: Convert to fraction form
    57,180.49/78,909.54 = 31,687.28/x
  3. Step 3: Cross multiply
    57,180.49x = 78,909.54 × 31,687.28
  4. Step 4: Simplify right side
    57,180.49x = 2,500,428,471.19
  5. Step 5: Solve for x
    x = 2,500,428,471.19/57,180.49
  6. Step 6: Final answer
    x = 43,728.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.